<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../00.依赖包/react.development.js"></script>
  <script src="../00.依赖包/react-dom.development.js"></script>
  <script src="../00.依赖包/babel.min.js"></script>
  <script src="../00.依赖包/prop-types.js"></script>
</head>

<body>
  <div id="app"></div>
  <script type="text/babel">
    class App extends React.Component{
      constructor(){
        super()
        console.log('constructor:创建组件时的构造器函数');
      }
      UNSAFE_componentWillMount(){
        console.log("componentWillMount:组件即将挂载");
      }
        render(){
          console.log('render:组件挂载中');
          return (
            <div>
               <h1>挂载流程</h1>
            </div>
          )
        } 
      //主要用户执行组件初始化的操作:比如ajax请求,定时器,订阅等
      componentDidMount(){
        console.log("componentDidMount:组件挂载完成");
      }  
    }

    

    const root = ReactDOM.createRoot(document.getElementById('app'));
    root.render(<App/>)

  </script>
</body>

</html>